Sneeky Spi [1981] ｜ ｜ ｜―Vaguely Sneeky [1990] ｜ ｜ ｜―Surreptitious [2003] ｜ ｜―Frizzle [1996] ｜ ｜―Pearl Academy [2007] ｜ ｜―Cultured Pearl [2012] ｜ ｜―Unusual Culture [2018]